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package ca.uhn.fhir.rest.method;

/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2016 University Health Network
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
import static org.apache.commons.lang3.StringUtils.isBlank;

import java.lang.reflect.Method;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import org.hl7.fhir.instance.model.api.IBaseResource;

import ca.uhn.fhir.context.ConfigurationException;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.annotation.ConditionalUrlParam;
import ca.uhn.fhir.rest.api.RestOperationTypeEnum;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;

class ConditionalParamBinder implements IParameter {

	private RestOperationTypeEnum myOperationType;
	private boolean mySupportsMultiple;

	ConditionalParamBinder(RestOperationTypeEnum theOperationType, boolean theSupportsMultiple) {
		Validate.notNull(theOperationType, "theOperationType can not be null");
		myOperationType = theOperationType;
		mySupportsMultiple = theSupportsMultiple;
	}

	@Override
	public void initializeTypes(Method theMethod, Class> theOuterCollectionType, Class> theInnerCollectionType, Class theParameterType) {
		if (theOuterCollectionType != null || theInnerCollectionType != null || theParameterType.equals(String.class) == false) {
			throw new ConfigurationException("Parameters annotated with @" + ConditionalUrlParam.class.getSimpleName()  + " must be of type String, found incorrect parameteter in method \"" + theMethod + "\"");
		}
	}

	public boolean isSupportsMultiple() {
		return mySupportsMultiple;
	}

	@Override
	public void translateClientArgumentIntoQueryArgument(FhirContext theContext, Object theSourceClientArgument, Map> theTargetQueryArguments, IBaseResource theTargetResource) throws InternalErrorException {
		throw new UnsupportedOperationException("Can not use @" + getClass().getName() + " annotated parameters in client");
	}

	@Override
	public Object translateQueryParametersIntoServerArgument(RequestDetails theRequest, BaseMethodBinding theMethodBinding) throws InternalErrorException, InvalidRequestException {
		return theRequest.getConditionalUrl(myOperationType);
	}

}